Case Studies for a Genetics Unit: A Review

I recently went through the Case Studies on that amazing National Center for Case Study Teaching in Science website, and I scoured it for case studies that I could potentially use in my genetics unit for 9th grade biology. Here’s what I found:

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Twinning

I have this one class. I sometimes wonder whether or not they have a pulse. I’ve tried all year long to get them excited, but every time I try, all I get is… cricket cricket.

Today though, we talked about how humans get genetic diversity through meiosis and such, and we were talking about how there’s a tiny tiny chance (about 1 in 200 billion) of making a person exactly identical to you. All of a sudden, I had their attention. Then someone asked: Has it ever been done before? Had two people that were genetically identical but who weren’t identical twins? #extracredit. I guess we’ll see tomorrow.

But until then, I found some super cool resources that I’d love to show them one day when I get to the twin mini-lesson.

I’d love to show them this image: identical twins marrying identical twins and having babies:

twins marrying twins

And have them read this article: A Thing or Two About Twins from National Geographic to give them the twins perspective on being twins.

I would also love to delve into the nature versus nurture issue: do our genes make us who we are or is it the environment?